package com.bennu.controller;



import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.bennu.Dto.DishDto;
import com.bennu.common.R;
import com.bennu.domain.Category;
import com.bennu.domain.Dish;
import com.bennu.domain.DishFlavor;
import com.bennu.service.CategoryService;
import com.bennu.service.DishFlavorService;
import com.bennu.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private DishFlavorService dishFlavorService;
    @Autowired
    private CategoryService categoryService;
    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 新增菜品
     * @param dishDto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto){
        log.info( dishDto.toString() );
        dishService.saveWithFlavor( dishDto );
        String key = "dish_" + dishDto.getCategoryId() + "_" + dishDto.getStatus();
        redisTemplate.keys( key );
        return R.success( "新增菜品成功" );
    }
    //菜品分页查询
    @GetMapping("/page")
    public R<Page> page(int page ,int pageSize,String name){
        Page<Dish> pageInfo=new Page<>(page,pageSize);
        Page<DishDto> dishDtoPage=new Page<>(page,pageSize);
        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.like( name!=null,Dish::getName,name );
        //添加排序条件(根据更新时间降序排列)
        queryWrapper.orderByDesc( Dish::getUpdateTime );
        //执行查询
        dishService.page( pageInfo,queryWrapper );
        //对象拷贝(忽略record)
        BeanUtils.copyProperties( pageInfo,dishDtoPage,"records" );
        List<Dish> records = pageInfo.getRecords();
        //record,页面是上的所有数据，获取到record，遍历record获取其中的categoryId
        List<DishDto> list= records.stream().map( (item)->{
            DishDto dishDto=new DishDto();
            //将item拷贝到dishDto中
            BeanUtils.copyProperties( item,dishDto );
            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById( categoryId );
            if ( category!=null ){
                //获取分类名称
                String categoryName = category.getName();
                //获取出的分类名称赋值给dishDto
                dishDto.setCategoryName( categoryName );
            }
            return dishDto;
        } ).collect( Collectors.toList() );
        dishDtoPage.setRecords( list );
        return R.success( dishDtoPage );
    }
    //修改菜品(根据id查询)
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id){
        log.info( id.toString());
        DishDto dishDto = dishService.getByIdWithFlavor( id );
        return R.success( dishDto );
    }
    //修改
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto){
        log.info( dishDto.toString() );
        dishService.updateWithFlavor(dishDto);
        //清理所有菜品缓存数据，如果不清理缓存，后台更新数据后，用户端的数据仍为更新之前数据
        /*Set keys = redisTemplate.keys( "dish_*" );
        redisTemplate.delete( keys );*/
        //精确清理,清理更新后的分类
        //动态构造key
        String key = "dish_" + dishDto.getCategoryId() + "_" + dishDto.getStatus();
        redisTemplate.keys( key );
        return R.success( "菜品修改成功" );
    }
    //商品起售
    @PostMapping("/status/{status}")
    public R<String> updateStatus(@PathVariable Integer status, Long[] ids){
        log.info( String.valueOf( status ),ids);
        for (int i = 0; i < ids.length; i++) {
            Long id=ids[i];
            Dish byId = dishService.getById( id );
            byId.setStatus( status );
            dishService.updateById( byId );
        }
        return R.success( "修改成功" );
    }
    //菜品删除
    @DeleteMapping
    public R<String> isDelete(@RequestParam List<Long> ids){
        log.info( String.valueOf( ids ) );
        dishService.removeId( ids );
        return R.success( "删除成功" );
    }
    //套餐管理页面添加菜品列表
  /*  @GetMapping("/list")
    public R<List<Dish>> list( Dish dish){
        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq( dish.getCategoryId()!=null,Dish::getCategoryId,dish.getCategoryId() );
        queryWrapper.eq( Dish::getStatus,1 );
        //添加排序条件
        queryWrapper.orderByAsc( Dish::getSort ).orderByDesc( Dish::getUpdateTime );
        List<Dish> list = dishService.list( queryWrapper );
        return R.success( list );
    }*/
    //套餐管理页面添加菜品列表,用户菜单展示口味
    @GetMapping("/list")
    public R<List<DishDto>> list( Dish dish){
        List<DishDto> dishDtoList = null;

        //动态构造key
        String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus();//dish_1397844391040167938_1

        //先从redis中获取缓存数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);

        if(dishDtoList != null){
            //如果存在，直接返回，无需查询数据库
            return R.success(dishDtoList);
        }
        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq( dish.getCategoryId()!=null,Dish::getCategoryId,dish.getCategoryId() );
        queryWrapper.eq( Dish::getStatus,1 );
        //添加排序条件
        queryWrapper.orderByAsc( Dish::getSort ).orderByDesc( Dish::getUpdateTime );
        List<Dish> list = dishService.list( queryWrapper );
         dishDtoList= list.stream().map( (item)->{
            DishDto dishDto=new DishDto();
            BeanUtils.copyProperties( item,dishDto );
            //获取分类id
            Long categoryId = item.getCategoryId();
            Category category = categoryService.getById( categoryId );
            if ( category!=null ){
                String categoryName = category.getName();
                dishDto.setCategoryName( categoryName );
            }
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> queryWrapper1=new LambdaQueryWrapper<>();
            queryWrapper1.eq( DishFlavor::getDishId,dishId );
            List<DishFlavor> dishFlavors = dishFlavorService.list( queryWrapper1 );
            dishDto.setFlavors( dishFlavors );
            return dishDto;
        } ).collect( Collectors.toList() );
        //如果不存在，需要查询数据库，将查询到的菜品数据缓存到Redis
        redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);
        return R.success( dishDtoList );
    }
}
